The data covers only three months, April 1st through June 30th. But even at this early stage, it tells some very clear stories about who these candidates are and their strategies for winning the race.

Where each campaign is spending its money (details below)

Hillary Clinton

Amount raised: $47.5M / Amount spent: $18.7M

Hillary’s campaign paid $18,000 to Bitly, whose products include Branded Short Domains, such as the hrc.io domain seen in her tweets.

Hillary is preparing to go big.

At this early stage of the race, her expense report already lists 344 individuals on her payroll. For comparison, the next biggest team is Jeb’s with 58 people.

And she looks to be making room to grow the team even more. The Campaign’s financials include “rent” payments for 26 different locations, including her new 80,000 square foot Brooklyn office.

Hillary’s technology is leagues ahead of everyone else.

I was genuinely impressed to see some of the tech companies her campaign is working with. Her expenses include payments to Github, Slack, Bitly, Optimizely, and even Kaggle, a website that hosts data science competitions.

Oddest expenses:

Jeb Bush

Amount raised: $11.4M / Amount spent: $3.1M

The Bush Campaign spent $371k on “computer equipment”

Relative to the size of his staff, Jeb spent a lot on rent and equipment.

Despite having a payroll of just 58 people, the campaign is paying $77k in monthly rent for a 30,000 square foot Miami office. Per person, that’s 517 square feet, more area than many Manhattan apartments.

The campaign also spent $371k on “computer equipment,” which comes out to over $5,000 per person.

The campaign financials only cover expenses that were made before June 30th, and Jeb only announced his candidacy on June 15th. So it seems likely these expenses reflect an operation that is still ramping up.

Oddest expense:

A $3,889 bill from the ultra-luxury Mandarin Oriental Hotel in Miami. Based on the rest of his expenses, Jeb doesn’t appear to be splurging on personal luxuries, but it looks like he made an exception for his trip to Miami.

Bernie Sanders

Bernie is frugal with travel expenses, and pretty much everything else.

His campaign regularly travels by Amtrak rather than by air, and their hotel choices are modest, as evidenced by a June stay in Motel 6.

The Sanders campaign spent most of its money on media, mostly digital.

In the Campaign’s first three months, it spent $1.9M on media. Of that amount, $1.2M went to a 3rd party business called Revolution Messaging, whose web site describes it as a “full-service digital agency fighting for progressive causes.”

Oddest expense:

Eight “computer equipment” purchases ranging from $129 to $460.

My first thought was that the campaign must not place a high value on technology. But looking closer I think it’s just the opposite.

Some of the equipment was bought at Crucial.com, a store that sells solid state drives and internal memory upgrades. The Campaign wouldn’t be shopping there unless they were doing some serious number crunching (or playing a lot of video games).

Another interesting item from the fundraising side: the campaign received a donation of $822 worth of ice cream from Ben and Jerry.

Rand Paul

Amount raised: $6.9M / Amount spent: $2.8M

Rand Paul buys randpaul.com for $100,890

Paul has a clear focus on technology.

His financials show payments to three different businesses for “data work.” All appear to specialize in data mining / machine learning for marketing purposes.

The Campaign’s marketing strategy also looks to involve a wide range of digital media types, some of it outsourced and some purchased in-house. And Paul even accepts bitcoin donations on his website.

Oddest expense:

His purchase of randpaul.com for a whopping $100,890.

The domain was purchased by his senatorial reelection committee just before he officially announced he presidential bid.

Marco Rubio

Amount raised: $8.9M / Amount spent: $3.1M

Marco Rubio’s campaign spent most of its media dollars on direct mail

Rubio spent his media dollars on direct mail.

All but a small fraction of his $380k media spend is labeled as “direct mail production,” “printing,” or “shipping.”

A focus on Iowa?

The only mailing list appearing in his expense report is one he purchased from the Republican Party of Iowa.

Rubio’s staff has strong ties in Iowa, including his senior political advisor Heath Thompson, who helped elect Iowan Jodi Ernst to the Senate.

As of last Sunday, Rubio was #8 in the Iowa polls. So whether or not he was focused on Iowa before, chances are he is now looking elsewhere.

Oddest expense:

$654,439 paid to Campaign Solutions and $101,865 paid to Mustard Seed for “revenue shares.” Presumably he is paying these companies commission to help him with fundraising.

For someone in the world of campaign finance, this kind of arrangement is probably pretty standard. But to me, that sounds like an awfully big chunk of whatever amount they helped him raise. His total fundraising for the quarter, from all sources, was $8.9M.

The lesson for future Rubio donors: Donate to the campaign directly, or a chunk of your money may get taken off the top.

He travels in limousines and private jets.

“While other candidates were stepping onto their Gulfstream jets with catered food, flying out the moment they got onboard, I was often sitting on the floor in a crowded terminal eating something from the airport food court…”

I'm an NYC-based entrepreneur (my newest project: Blueshift) and adjunct instructor at UPenn. I'm fascinated by data visualization and the ways that data is transforming our understanding of the world. I spend a lot of time with my face buried in Excel, and when I find something interesting I write about it here and also as a Guardian Cities and Huffington Post contributor.More about my background